Improvement in electro-magnets



WILLIAM W. SMITH, CF CINCINNATI,

onto.

Letters Patent No. 106,418, (lated August 16, 1870.

IMPROVEMENT IN ELECTRO-MAGNETS.

The Schedule referred to in these Letters Patent and making part of the same To all whom lit may concern:

, Be it known that I, WILLIAM W. SMITH, of Cincinnati, Hamilton coimty, State of Ohio, have invented a certain new and useful Iinmoved Method of Connecting the Coils ot' Electio-liagiicts on Telegraph Lines; and I do hereby declare the following to be a sufficiently full, clear, and exact description thereof to enable one skilled in the art to which my invention appertaius to ipake and use it, reference being had to the accompanyingdrawings making part of this specification.

The object of my invention is to materially lessen Athe resistance to the passage of electric currents through the coils of electro-magnets, as applied to telegraphic lilies; and

My invention consists in so connectingr and attaching the coils as to dievide the current, and conduct it through the coils simultaneously, instead of passing the whole current through the coils consecutively, as' hcietofore.

, In the accompanying drawings, illustrative of my inventiou- I Figure 1 is a perspective view of the electro-magnetic coils and connecting-wires embodying my invention. I

Figure 2 exhibits thc old method of connecting the wires, they being so attached that the entire current passes througlbne coil before reaching the other.

In order to construct an apparatus embodying my invention, it is not-necessary to make or wind coils especially for it, as the improvement can be applied to all electromagnets as now used on telegraph-lines, by changingr the arrangementof the connecting wires.

For Athe alteration of old electro-magnets, and the construction of new, my direction is to connect to# gether (as at 2) the Awires A B, leading into the coil-s from one pole of the battery, and at o, the wires C I) leading froum the coils to the other pole of the battery. The only precaution necessary to be observed is to so conduct the current through the coils as to obtain the proper polarity of the cores, as in other magnets.

By ygaactcal application of, this improvement to telegraph lines, and by tests with differential galvanometers capable of accu ate measurement, itis found that pipe simultaneously.

The application of my invention will be more imme- `diately beneficial to railway telegraphs and other lines having a large number of ofiices on the same circuit, as their condition will then more nearly approach tha-t of the tln'ough-circuits having but few offices, and they will be enabled to work with more certainty in all weather. The signals ou these magnets are more distinct than when connected in the old way.

As an illustration of'the practical advantage of my invention, I will state that a telegraph line having twenty ottices would., by the old method, have aresistance of from three hundred to tive hundred miles-in the magnets, and the same line, with the same number of oces, constructed to embody my improvement, would have but from seventy-tive to one hundred and twenty-five miles resist-ance.

I claim herein as new and of my invention- The herein-described method of dividing and simul taneousiy passing the electric current through the coils of electro-magnets, as' applied to telegraph lines, by the connection orjunction of wires A B and wires C D, in the manner substantially as shown, for the purpose of greatly reducing the resistance to the passage of electric currents through the coils of the magnets, as set forth.

In testimony of which invention I hereunto set my hand.

YV. W. SMITH.

Witnesses FRANK MILLWARD, J. L. WARTMANN. 

